Thread-cutting attachment



J. M. C. JOHNSON.

THREAD CUTTING ATTACHMENT.

APPLICATION FILED JAN. 2, 1918.

-1 ,8 1 1 125. v Patented July 22, 1919.

Jay M 6. Ja/msofl JAY M. G. JOHNSON, OF SEATTLE, WASHINGTON.

THREAD-CUTTING ATTACHMENT.

To all whom it may concern:

' Be it known that I, JAY M. C. JOHNSON, a citizen of the United States, and resident of the city of Seattle, county of King, and State of \Vashington, have invented certain new and useful Improvements in Thread- Cutting Attachments, of which the following is a specification.

My invention relates to cutting devices adapted for attachment to other articles, and is herein shown as designed for attachment to a thimble, and to be used for purposes of cutting threads.

The object of my invention is to provide a device which may be conveniently attached to a thimble or other article and which may be used to conveniently cut threads.

My invention comprises the novel parts which are herein described and then particularly set forth in the claim. In the accompanying drawings I have illustrated this device in the form of construction which I most prefer.

Figure 1 is a longitudinal section through a thimble showing my device applied thereto.

Fig. 2 is an end view of the thimble with the thread cutting attachment applied thereto.

The thread cutting attachment, in the form of construction herein shown, is preferably made out of thin sheet metal. It consists of two fingers, 1 and 2, which are substantially parallel in relation and which are joined at one end, as shown at 3. Be tween these two fingers is formed a narrow opening which preferably runs to a sharp point at its bottom end and which is open at the other end for free entrance of the thread. The edges of one or both of the fin gers which form the margin of this notch or gap, are sharpened so that they may be used as cutting mediums. This construction is clearly shown in the end View of Fig. 2.

The finger 1, which forms the base of the device, is composed of two right angularly positioned flanges, the laterally projecting flange 10 forming a base of increased width whereby the device may be better supported .when attached to a thimble or other article.

At each end of the base finger l is formed Specification of Letters Patent.

Patented July 22, 1919.

Application filed January 2, 1918. Serial No. 209,865.

a spur or offset finger. The spur 4:, which is at the separated ends of the two fingers, is somewhat longer than the other and so constructed that it may be inserted into a hole, as 6, of the thimble and have the point extend under the outer ed e of the hole. The other spur 5 is of sufficient length to extend to the inner surface of the thimble wall, and preferably somewhat under this, this slight extension serving to better hold it in position.

The position of the holes 6 and 7 in the thimble, and the separation of the spurs 4 and 5 of the attachment, are so proportioned to each other that the spur 4;, when inserted into the hole 6 will permit the attachment to be brought down in such manner as to make it necessary to slightly spring the finger 1, or the wall of the thimble, or both, in order to insert the spur 5 in its place.

As the strain applied to the device in cutting is of such nature as to hold this latter spur 5 in place and to lift the opposite spur 4, and as this spur 4 has its edge extending under the wall of the slot 6, the device cannot be removed in this way by any strain which it is likely to get inordinary use.

In applying the thimble to the finger the open end of the cutting fingers extend outwardly in convenient position, so that it may be passed over the thread. As it is held against the thread while being moved across the same it will easily out the thread. It may be employed for cutting twine of considerable size.

. What I claim as my invention is:

A thread cutting attachment for thimbles comprising a metal plate bent to form two connected flanges which are substantially at right angles, one of said flanges having prongs at its ends by which it may be secured to the thimble and the other flange being slotted inward from one end to form two slightly separated fingers having their adjacent edges sharpened and both extending substantially parallel with the side of the thimble.

Signed at Seattle, Washington, this 24th day of December, 1917.

JAY M. C. JOHNSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0. 

